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Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales, Parmeliaceae). Data set author(s): Nöske, N. M. @EXCL@ Clerc, P. (04-10-27). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous. Taxonomic rank: species. Currently accepted name Xanthoparmelia darlingensis Elix & J. Johnst. Xanthoparmelia. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Xanthoparmelia darlingensis Elix & J. Johnst. Type: Xanthoparmelia darlingensis Elix & J. Johnst.

Biogeography: Southern hemispheric (endemic, very rare). Continent: Australasia. Checklist records: Australia (known only from the type collection).

Thallus: Foliose (small-foliose to subcrustose), subdivided into main parts, isotomic-dichotomous (dichotomously but sparingly branched), dispersed throughout and distinctly seperate (widely separate), lobed (small-foliose to subcrustose); lobes elongate or linear; branches applanate (moderately flattened); separate thallus parts.2-.8-(1) mm wide. Thallus Size and Differentiation: 2-3 cm in diameter. Upper Surface: Lime green (darkening to deep olive-brown or blackish in older lobes), matt, rough (often developing transverse cracks in older lobes); immaculate; not isidate; not sorediate. Lower Surface: Present, black; attached by holdfasts (very tightly adnate); rhizinate (robust); rhizines abundant, black, not branched.

Secondary Metabolites: Present; throughout the thallus medulla, 4-O-demethylbarbatic acid, constictic acid, norstictic acid, stictic acid (stictic acid (major), constictic and norstictic acid (minor); other secondary metabolites: cryptostictic acid (trace) and barbatic acid (major)), and usnic acid.

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